linux-gen: add runtime configuration file

Enables changing ODP runtime configuration options by using an optional
configuration file (libconfig). Path to the conf file is passed using
environment variable ODP_CONF_FILE. If ODP_CONF_FILE or a particular option
is not set, hardcoded default values are used instead. An template
configuration file is provided in config/odp-linux.conf.

Runtime configuration is initially used by DPDK pktio to set NIC options.

Adds new dependency to libconfig library.

Signed-off-by: Matias Elo <matias.elo@nokia.com>
Reviewed-by: Dmitry Eremin-Solenikov <dmitry.ereminsolenikov@linaro.org>
Reviewed-by: Bill Fischofer <bill.fischofer@linaro.org>
Signed-off-by: Maxim Uvarov <maxim.uvarov@linaro.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/config/odp-linux-generic.conf b/config/odp-linux-generic.conf
new file mode 100644
index 000000000..15e65d00f
--- /dev/null
+++ b/config/odp-linux-generic.conf
@@ -0,0 +1,32 @@
+# ODP runtime configuration options
+#
+# This template configuration file (odp-linux-generic.conf) is hardcoded
+# during configure/build phase and the values defined here are used if
+# optional ODP_CONFIG_FILE is not set. This configuration file MUST
+# include all configuration options.
+#
+# ODP_CONFIG_FILE can be used to override default values and it doesn't
+# have to include all available options. The missing options are
+# replaced with hardcoded default values.
+#
+# The options defined here are implementation specific and valid option
+# values should be checked from the implementation code.
+#
+# See libconfig syntax: https://hyperrealm.github.io/libconfig/libconfig_manual.html#Configuration-Files
+
+# Mandatory fields
+odp_implementation = "linux-generic"
+config_file_version = "0.0.1"
+
+# DPDK pktio options
+pktio_dpdk: {
+	# Default options
+	num_rx_desc = 128
+	num_tx_desc = 512
+	rx_drop_en = 0
+
+	# Driver specific options (use PMD names from DPDK)
+	net_ixgbe: {
+		rx_drop_en = 1
+	}
+}